KR20190057384A - Network access method for roaming service of mobile terminal and mobile terminal - Google Patents

Abstract

A network access method for a roaming service of a mobile terminal and a mobile terminal is disclosed. The mobile terminal according to the present invention includes the PLMNs detected in the terminal body in response to detection that all of the PLMNs stored in the terminal body, the wireless communication unit, the last registered PLMN, the home PLMN, and the SIM Based on the received information, a roaming area / country corresponding to the current location of the terminal body, and controlling the wireless communication unit to connect to one of the successfully camped PLMNs in the identified roaming area / country .

Description

Network access method for roaming service of mobile terminal and mobile terminal

The present invention relates to a mobile terminal connectable to a network, and a network access method for a roaming service.

A terminal can be divided into a mobile terminal (mobile / portable terminal) and a stationary terminal according to whether the terminal can be moved. The mobile terminal can be divided into a handheld terminal and a vehicle mounted terminal according to whether the user can directly carry the mobile terminal.

The functions of mobile terminals are diversified. For example, there are data and voice communication, photographing and video shooting through a camera, voice recording, music file playback through a speaker system, and outputting an image or video on a display unit. Some terminals are equipped with an electronic game play function or a multimedia player function. In particular, modern mobile terminals can receive multicast signals that provide visual content such as broadcast and video or television programs.

Such a terminal has various functions, for example, in the form of a multimedia device having multiple functions such as photographing and photographing of a moving picture, reproduction of a music or video file, reception of a game and broadcasting, etc. .

In addition, such a terminal can access a wireless network to provide a variety of services. Here, a wireless network refers to a system of interoperable components supporting one or more wireless communication services between two or more devices. Under certain circumstances, limited resources in a wireless network may limit the number and / or quality of service of terminals seeking access to wireless communication services.

Meanwhile, the mobile communication provider provides a roaming service to the user of the mobile terminal. The roaming service refers to a service that allows a mobile user to continue using a mobile communication service using a network of another provider even when the mobile communication user leaves the service area of the mobile communication service provider.

When the mobile terminal moves from the current network to another network, a procedure for searching and registering a network (PLMN) for roaming service should be preceded. Conventionally, the PLMN identification information is acquired for all frequencies sequentially received until a PLMN that can be registered in the base station is acquired, and the PLMN is searched for by repeating the registration procedure with the acquired PLMN. Therefore, The amount of battery current consumed by searching also increased. If the PLMN search period is lengthened, the disconnection time of the mobile communication service becomes long or the switching to the home network is delayed, resulting in unnecessary roaming charges. On the other hand, if the PLMN search cycle is shortened, the battery consumption becomes faster.

Accordingly, it is an object of the present invention to provide a network access method for a roaming service of a mobile terminal and a mobile terminal in which battery consumption is reduced while rapidly searching for a PLMN for roaming.

In order to solve the above problems, a network access method for a roaming service of a mobile terminal according to an embodiment of the present invention includes a last registered PLMN (Public Land Mobile Network), a home PLMN (Home Public Land Mobile Network) , And detecting failure of all of the search of PLMNs stored in SIM (SIM); Identifying a roaming area / country corresponding to a current location of the terminal based on information included in PLMNs searched in the terminal body; And performing roaming by connecting to one of the successfully camped PLMNs in the identified roaming area / country.

In one embodiment, the information included in the PLMNs found in the terminal body is at least one of a mobile country code (MCC) and a mobile network code (MNC).

In one embodiment, the method further comprises confirming that there is a previously camped PLMN in the identified roaming area / country and attempting to camp on the PLMN.

In one embodiment, the method further includes determining a wireless communication technology to camp on the basis of the optimal wireless communication technology (RAT) used when camping on successfully, when successfully camped in the PLMN previously in the identified roaming area / country .

In one embodiment, the method further comprises determining a PLMN to camp on the basis of the fixed list stored in the terminal body when the last registered PLMN in the identified roaming area / country is not available.

In one embodiment, when the PLMN determined based on the stored fixed list can not be used, the method further includes a step of sequentially camping-on from a PLMN having a strong signal strength among the PLMNs searched for in the terminal body do.

In one embodiment, the method further comprises automatically registering the PLMN as a preferred PLMN in the identified roaming area / country upon successful camping in the last registered PLMN in the identified roaming area / country.

In one embodiment, if the last registered PLMN in the identified roaming area / country is unavailable, checking the list of PLMNs approved as a home PLMN in the identified roaming area / country; And attempting to camp on according to a cycle stored in the SIM using the list of confirmed PLMNs.

According to another aspect of the present invention, there is provided a mobile terminal including: a terminal body; A wireless communication unit; And in response to detecting that all PLMNs stored in the last registered PLMN, the home PLMN, and the SIM (SIM) have failed to be found, the current position of the terminal body, based on the information contained in the PLMNs searched in the terminal body And to control the wireless communication unit to connect to one of the successfully camped PLMNs in the identified roaming area / country.

In one embodiment, the information included in the PLMNs found in the terminal body is at least one of a mobile country code (MCC) and a mobile network code (MNC).

In one embodiment, the controller is configured to control the wireless communication unit to attempt camping on a corresponding PLMN by checking whether there is a previously camped PLMN in the identified roaming area / country.

In one embodiment, the control unit is configured to determine, on the camping-on attempt, a wireless communication technology to camp on the basis of the optimal wireless communication technology (RAT) that was used when successfully camped in the PLMN previously in the identified roaming area / .

In one embodiment, the controller determines a PLMN to camp on the basis of the fixed list stored in the terminal body when the last registered PLMN in the identified roaming area / country is unavailable.

In one embodiment, when the PLMN determined based on the stored fixed list can not be used, the controller sequentially attempts to camp on from the PLMN having a strong signal strength among the PLMNs searched for in the terminal body.

As described above, according to the mobile terminal and its control method according to the embodiment of the present invention, time required for searching and camping a PLMN for a roaming service is reduced. In addition, as the search and camping of suitable PLMNs that provide roaming services is faster, battery consumption for network discovery is further reduced.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.
1B and 1C are perspective views of an example of a mobile terminal according to the present invention viewed from different directions.
2A is an exemplary diagram illustrating a wireless communication system of a mobile terminal according to the present invention.
2B is an exemplary diagram for explaining a roaming process of a mobile terminal according to the present invention.
3 is a representative flowchart for explaining an operation of searching for a network to be connected at the time of roaming in the mobile terminal related to the present invention.
4 is an exemplary flow chart for determining a wireless communication technology for use in connecting to a network in a roaming country / region in a mobile terminal according to the present invention.
5 is an exemplary flowchart for explaining an operation of searching for a network to be connected when the last registered network in the roaming country / region is not available, in the mobile terminal according to the present invention.
6 is an overall flowchart for explaining an operation of searching for and camping on a network to be connected at the time of roaming in the mobile terminal according to the present invention.
7A and 7B are diagrams for comparing operations of a mobile terminal performing an operation according to the present invention and an existing mobile terminal.
8 is a diagram illustrating a simulation setting for detecting a case where a network search method is applied to a mobile terminal related to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like or similar components are denoted by the same reference numerals, and redundant explanations thereof will be omitted. The suffix " module " and " part " for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The mobile terminal described in this specification includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, a slate PC A tablet PC, an ultrabook, a wearable device such as a smartwatch, a smart glass, and a head mounted display (HMD). have.

The mobile terminal described in this specification includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, a slate PC A tablet PC, an ultrabook, a wearable device such as a smartwatch, a smart glass, and a head mounted display (HMD). have.

However, it will be appreciated by those skilled in the art that the configuration according to the embodiments described herein may be applied to fixed terminals such as a digital TV, a desktop computer, a digital signage, and the like, will be.

1A to 1C are block diagrams for explaining a mobile terminal according to the present invention, and FIGS. 1B and 1C are conceptual diagrams showing an example of a mobile terminal according to the present invention in different directions.

The mobile terminal 100 includes a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a control unit 180, ), And the like. The components shown in FIG. 1A are not essential for implementing a mobile terminal, so that the mobile terminal described herein may have more or fewer components than the components listed above.

The wireless communication unit 110 may be connected between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and another mobile terminal 100 or between the mobile terminal 100 and the external server 100. [ Lt; RTI ID = 0.0 > wireless < / RTI > In addition, the wireless communication unit 110 may include one or more modules for connecting the mobile terminal 100 to one or more networks.

The wireless communication unit 110 may include at least one of a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short distance communication module 114, and a location information module 115 .

The input unit 120 includes a camera 121 or an image input unit for inputting a video signal, a microphone 122 for inputting an audio signal, an audio input unit, a user input unit 123 for receiving information from a user A touch key, a mechanical key, and the like). The voice data or image data collected by the input unit 120 may be analyzed and processed by a user's control command.

The sensing unit 140 may include at least one sensor for sensing at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information. For example, the sensing unit 140 may include a proximity sensor 141, an illumination sensor 142, a touch sensor, an acceleration sensor, a magnetic sensor, A G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared sensor, a finger scan sensor, an ultrasonic sensor, A microphone 226, a battery gauge, an environmental sensor (for example, a barometer, a hygrometer, a thermometer, a radiation detection sensor, A thermal sensor, a gas sensor, etc.), a chemical sensor (e.g., an electronic nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the mobile terminal disclosed in the present specification can combine and utilize information sensed by at least two of the sensors.

The output unit 150 includes at least one of a display unit 151, an acoustic output unit 152, a haptic tip module 153, and a light output unit 154 to generate an output related to visual, auditory, can do. The display unit 151 may have a mutual layer structure with the touch sensor or may be integrally formed to realize a touch screen. The touch screen may function as a user input unit 123 that provides an input interface between the mobile terminal 100 and a user and may provide an output interface between the mobile terminal 100 and a user.

The interface unit 160 serves as a path to various types of external devices connected to the mobile terminal 100. The interface unit 160 is connected to a device having a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, And may include at least one of a port, an audio I / O port, a video I / O port, and an earphone port. In the mobile terminal 100, corresponding to the connection of the external device to the interface unit 160, it is possible to perform appropriate control related to the connected external device.

In addition, the memory 170 stores data supporting various functions of the mobile terminal 100. The memory 170 may store a plurality of application programs or applications running on the mobile terminal 100, data for operation of the mobile terminal 100, and commands. At least some of these applications may be downloaded from an external server via wireless communication. Also, at least a part of these application programs may exist on the mobile terminal 100 from the time of shipment for the basic functions (e.g., telephone call receiving function, message receiving function, and calling function) of the mobile terminal 100. Meanwhile, the application program may be stored in the memory 170, installed on the mobile terminal 100, and may be operated by the control unit 180 to perform the operation (or function) of the mobile terminal.

In addition to the operations related to the application program, the control unit 180 typically controls the overall operation of the mobile terminal 100. The control unit 180 may process or process signals, data, information, and the like input or output through the above-mentioned components, or may drive an application program stored in the memory 170 to provide or process appropriate information or functions to the user.

In addition, the controller 180 may control at least some of the components illustrated in FIG. 1A in order to drive an application program stored in the memory 170. FIG. In addition, the controller 180 may operate at least two of the components included in the mobile terminal 100 in combination with each other for driving the application program.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power to the components included in the mobile terminal 100. The power supply unit 190 includes a battery, which may be an internal battery or a replaceable battery.

At least some of the components may operate in cooperation with one another to implement a method of operation, control, or control of a mobile terminal according to various embodiments described below. In addition, the operation, control, or control method of the mobile terminal may be implemented on the mobile terminal by driving at least one application program stored in the memory 170. [

Hereinafter, the various components of the mobile terminal 100 will be described in detail with reference to FIG. 1A.

First, referring to the wireless communication unit 110, the broadcast receiving module 111 of the wireless communication unit 110 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. Two or more broadcast receiving modules may be provided to the mobile terminal 100 for simultaneous broadcast reception or broadcast channel switching for at least two broadcast channels.

The mobile communication module 112 may be a mobile communication module or a mobile communication module such as a mobile communication module or a mobile communication module that uses technology standards or a communication method (e.g., Global System for Mobile communication (GSM), Code Division Multi Access (CDMA), Code Division Multi Access 2000 (Enhanced Voice-Data Optimized or Enhanced Voice-Data Only), Wideband CDMA (WCDMA), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution And an external terminal, or a server on a mobile communication network established according to a long term evolution (AR), a long term evolution (AR), or the like.

The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 100. The wireless Internet module 113 is configured to transmit and receive a wireless signal in a communication network according to wireless Internet technologies.

Wireless Internet technologies include, for example, wireless LAN (WLAN), wireless fidelity (Wi-Fi), wireless fidelity (Wi-Fi) Direct, DLNA (Digital Living Network Alliance), WiBro Interoperability for Microwave Access, High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE) and Long Term Evolution-Advanced (LTE-A) 113 transmit and receive data according to at least one wireless Internet technology, including Internet technologies not listed above.

The wireless Internet module 113 for performing a wireless Internet connection through the mobile communication network can be used for wireless Internet access by WiBro, HSDPA, HSUPA, GSM, CDMA, WCDMA, LTE or LTE- May be understood as a kind of the mobile communication module 112.

The short-range communication module 114 is for short-range communication, and includes Bluetooth ™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB) (Near Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technology. The short-range communication module 114 is connected to the mobile terminal 100 and the wireless communication system through the wireless area networks, between the mobile terminal 100 and another mobile terminal 100, or between the mobile terminal 100 ) And the other mobile terminal 100 (or the external server). The short-range wireless communication network may be a short-range wireless personal area network.

Here, the other mobile terminal 100 may be a wearable device (e.g., a smartwatch, a smart glass, etc.) capable of interchanging data with the mobile terminal 100 according to the present invention (smart glass), HMD (head mounted display)). The short range communication module 114 may detect (or recognize) a wearable device capable of communicating with the mobile terminal 100 around the mobile terminal 100. [ If the detected wearable device is a device authenticated to communicate with the mobile terminal 100 according to the present invention, the control unit 180 may transmit at least a part of the data processed by the mobile terminal 100 to the short- 114 to the wearable device. Therefore, the user of the wearable device can use the data processed by the mobile terminal 100 through the wearable device. For example, according to this, when a telephone is received in the mobile terminal 100, the user performs a telephone conversation via the wearable device, or when a message is received in the mobile terminal 100, It is possible to check the message.

The position information module 115 is a module for obtaining the position (or current position) of the mobile terminal, and a representative example thereof is a Global Positioning System (GPS) module or a Wireless Fidelity (WiFi) module. For example, when the mobile terminal utilizes the GPS module, it can acquire the position of the mobile terminal by using a signal transmitted from the GPS satellite. As another example, when the mobile terminal utilizes the Wi-Fi module, it can acquire the position of the mobile terminal based on information of a wireless access point (AP) that transmits or receives the wireless signal with the Wi-Fi module. Optionally, the location information module 115 may perform any of the other functions of the wireless communication unit 110 to obtain data relating to the location of the mobile terminal, in addition or alternatively. The location information module 115 is a module used to obtain the location (or current location) of the mobile terminal, and is not limited to a module that directly calculates or obtains the location of the mobile terminal.

Next, the input unit 120 is for inputting image information (or signal), audio information (or signal), data, or information input from a user. For inputting image information, Or a plurality of cameras 121 may be provided. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame may be displayed on the display unit 151 or stored in the memory 170. [ A plurality of cameras 121 provided in the mobile terminal 100 may be arranged to have a matrix structure and various angles or foci may be provided to the mobile terminal 100 through the camera 121 having the matrix structure A plurality of pieces of image information can be input. In addition, the plurality of cameras 121 may be arranged in a stereo structure to acquire a left image and a right image for realizing a stereoscopic image.

The microphone 122 processes the external acoustic signal into electrical voice data. The processed voice data can be utilized variously according to a function (or a running application program) being executed in the mobile terminal 100. Meanwhile, the microphone 122 may be implemented with various noise reduction algorithms for eliminating noise generated in receiving an external sound signal.

The user input unit 123 is for receiving information from a user and when the information is inputted through the user input unit 123, the control unit 180 can control the operation of the mobile terminal 100 to correspond to the input information . The user input unit 123 may include a mechanical input unit or a mechanical key such as a button located on a front or rear or side of the mobile terminal 100, a dome switch, a jog wheel, Jog switches, etc.) and touch-type input means. For example, the touch-type input means may comprise a virtual key, a soft key or a visual key displayed on the touch screen through software processing, And a touch key disposed on the touch panel. Meanwhile, the virtual key or the visual key can be displayed on a touch screen having various forms, for example, a graphic, a text, an icon, a video, As shown in FIG.

Meanwhile, the sensing unit 140 senses at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information, and generates a corresponding sensing signal. The control unit 180 may control the driving or operation of the mobile terminal 100 or may perform data processing, function or operation related to the application program installed in the mobile terminal 100 based on the sensing signal. Representative sensors among various sensors that may be included in the sensing unit 140 will be described in more detail.

First, the proximity sensor 141 refers to a sensor that detects the presence of an object approaching a predetermined detection surface, or the presence of an object in the vicinity of the detection surface, without mechanical contact by using electromagnetic force or infrared rays. The proximity sensor 141 may be disposed in the inner area of the mobile terminal or in proximity to the touch screen, which is covered by the touch screen.

Examples of the proximity sensor 141 include a transmission type photoelectric sensor, a direct reflection fluorescent light sensor, a mirror reflection fluorescent light sensor, a high frequency oscillation proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. In the case where the touch screen is electrostatic, the proximity sensor 141 can be configured to detect the proximity of the object with a change of the electric field along the proximity of the object having conductivity. In this case, the touch screen (or touch sensor) itself may be classified as a proximity sensor.

On the other hand, for convenience of explanation, the act of recognizing that the object is located on the touch screen in proximity with no object touching the touch screen is referred to as " proximity touch & The act of actually touching an object on the screen is called a " contact touch. &Quot; The position at which the object is closely touched on the touch screen means a position where the object corresponds to the touch screen vertically when the object is touched. The proximity sensor 141 can detect a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, have. Meanwhile, the control unit 180 processes data (or information) corresponding to the proximity touch operation and the proximity touch pattern sensed through the proximity sensor 141 as described above, and further provides visual information corresponding to the processed data It can be output on the touch screen. Furthermore, the control unit 180 can control the mobile terminal 100 such that different operations or data (or information) are processed according to whether the touch to the same point on the touch screen is a proximity touch or a touch touch .

The touch sensor senses a touch (or touch input) applied to the touch screen (or the display unit 151) by using at least one of various touch methods such as a resistance film type, a capacitive type, an infrared type, an ultrasonic type, do.

For example, the touch sensor may be configured to convert a change in a pressure applied to a specific portion of the touch screen or a capacitance generated in a specific portion to an electrical input signal. The touch sensor may be configured to detect a position, an area, a pressure at the time of touch, a capacitance at the time of touch, and the like where a touch object touching the touch screen is touched on the touch sensor. Here, the touch object may be a finger, a touch pen, a stylus pen, a pointer, or the like as an object to which a touch is applied to the touch sensor.

Thus, when there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. Thus, the control unit 180 can know which area of the display unit 151 is touched or the like. Here, the touch controller may be a separate component from the control unit 180, and may be the control unit 180 itself.

On the other hand, the control unit 180 may perform different controls or perform the same control according to the type of the touch object touching the touch screen (or a touch key provided on the touch screen). Whether to perform different controls or to perform the same control according to the type of the touch object may be determined according to the current state of the mobile terminal 100 or an application program being executed.

On the other hand, the touch sensors and the proximity sensors discussed above can be used independently or in combination to provide a short touch (touch), a long touch, a multi touch, a drag touch ), Flick touch, pinch-in touch, pinch-out touch, swipe touch, hovering touch, and the like. Touch can be sensed.

The ultrasonic sensor can recognize the position information of the object to be sensed by using ultrasonic waves. Meanwhile, the controller 180 can calculate the position of the wave generating source through the information sensed by the optical sensor and the plurality of ultrasonic sensors. The position of the wave source can be calculated using the fact that the light is much faster than the ultrasonic wave, that is, the time when the light reaches the optical sensor is much faster than the time the ultrasonic wave reaches the ultrasonic sensor. More specifically, the position of the wave generating source can be calculated using the time difference with the time when the ultrasonic wave reaches the reference signal.

The camera 121 includes at least one of a camera sensor (for example, a CCD, a CMOS, etc.), a photo sensor (or an image sensor), and a laser sensor.

The camera 121 and the laser sensor may be combined with each other to sense a touch of the sensing object with respect to the three-dimensional stereoscopic image. The photosensor can be laminated to the display element, which is adapted to scan the movement of the object to be detected proximate to the touch screen. More specifically, the photosensor mounts photo diodes and TRs (Transistors) in a row / column and scans the contents loaded on the photosensor using an electrical signal that varies according to the amount of light applied to the photo diode. That is, the photo sensor performs coordinate calculation of the object to be sensed according to the amount of change of light, and position information of the object to be sensed can be obtained through the calculation.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven by the mobile terminal 100 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information .

In addition, the display unit 151 may be configured as a stereoscopic display unit for displaying a stereoscopic image.

In the stereoscopic display unit, a three-dimensional display system such as a stereoscopic system (glasses system), an autostereoscopic system (no-glasses system), and a projection system (holographic system) can be applied.

The sound output unit 152 may output audio data received from the wireless communication unit 110 or stored in the memory 170 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output unit 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The audio output unit 152 may include a receiver, a speaker, a buzzer, and the like.

The haptic module 153 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 153 may be vibration. The intensity and pattern of the vibration generated in the haptic module 153 can be controlled by the user's selection or the setting of the control unit. For example, the haptic module 153 may synthesize and output different vibrations or sequentially output the vibrations.

In addition to vibration, the haptic module 153 may be configured to perform various functions such as a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or suction force of the air through the injection port or the suction port, a touch on the skin surface, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 153 can transmit the tactile effect through the direct contact, and the tactile effect can be felt by the user through the muscles of the finger or arm. The haptic module 153 may include two or more haptic modules 153 according to the configuration of the mobile terminal 100.

The light output unit 154 outputs a signal for notifying the occurrence of an event using the light of the light source of the mobile terminal 100. Examples of events that occur in the mobile terminal 100 may include message reception, call signal reception, missed call, alarm, schedule notification, email reception, information reception through an application, and the like.

The signal output from the light output unit 154 is implemented as the mobile terminal emits light of a single color or a plurality of colors to the front or rear surface. The signal output may be terminated by the mobile terminal detecting the event confirmation of the user.

The interface unit 160 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 160 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data in the mobile terminal 100 to an external device. For example, a port for connecting a device equipped with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, an audio I / O port, a video I / O port, an earphone port, and the like may be included in the interface unit 160.

The identification module is a chip for storing various information for authenticating the use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM) A universal subscriber identity module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the interface unit 160. [

The interface unit 160 may be a path through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, And various command signals may be transmitted to the mobile terminal 100. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal 100 is correctly mounted on the cradle.

The memory 170 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 170 may store data related to vibration and sound of various patterns outputted when a touch is input on the touch screen.

The memory 170 may be a flash memory type, a hard disk type, a solid state disk type, an SDD type (Silicon Disk Drive type), a multimedia card micro type ), Card type memory (e.g., SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read memory, a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs the storage function of the memory 170 on the Internet.

Meanwhile, as described above, the control unit 180 controls the operations related to the application program and the general operation of the mobile terminal 100. [ For example, when the state of the mobile terminal meets a set condition, the control unit 180 can execute or release a lock state for restricting input of a user's control command to applications.

In addition, the control unit 180 performs control and processing related to voice communication, data communication, video call, or the like, or performs pattern recognition processing to recognize handwriting input or drawing input performed on the touch screen as characters and images, respectively . Further, the controller 180 may control any one or a plurality of the above-described components in order to implement various embodiments described below on the mobile terminal 100 according to the present invention.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components. The power supply unit 190 includes a battery, the battery may be an internal battery configured to be chargeable, and may be detachably coupled to the terminal body for charging or the like.

In addition, the power supply unit 190 may include a connection port, and the connection port may be configured as an example of an interface 160 through which an external charger for supplying power for charging the battery is electrically connected.

As another example, the power supply unit 190 may be configured to charge the battery in a wireless manner without using the connection port. In this case, the power supply unit 190 may use at least one of an inductive coupling method based on a magnetic induction phenomenon from an external wireless power transmission apparatus and a magnetic resonance coupling method based on an electromagnetic resonance phenomenon Power can be delivered.

In the following, various embodiments may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

Referring to FIGS. 1B and 1C, the disclosed mobile terminal 100 includes a bar-shaped terminal body. However, the present invention is not limited thereto and can be applied to various structures such as a folder type, a flip type, a slide type, a swing type, and a swivel type in which a watch type, a clip type, a glass type or two or more bodies are relatively movably coupled . A description of a particular type of mobile terminal, although relevant to a particular type of mobile terminal, is generally applicable to other types of mobile terminals.

Here, the terminal body can be understood as a concept of referring to the mobile terminal 100 as at least one aggregate.

The mobile terminal 100 includes a case (for example, a frame, a housing, a cover, and the like) that forms an appearance. As shown, the mobile terminal 100 may include a front case 101 and a rear case 102. Various electronic components are disposed in the inner space formed by the combination of the front case 101 and the rear case 102. At least one middle case may be additionally disposed between the front case 101 and the rear case 102.

A display unit 151 is disposed on a front surface of the terminal body to output information. The window 151a of the display unit 151 may be mounted on the front case 101 to form a front surface of the terminal body together with the front case 101. [

In some cases, electronic components may also be mounted on the rear case 102. Electronic parts that can be mounted on the rear case 102 include detachable batteries, an identification module, a memory card, and the like. In this case, a rear cover 103 for covering the mounted electronic components can be detachably coupled to the rear case 102. Therefore, when the rear cover 103 is separated from the rear case 102, the electronic parts mounted on the rear case 102 are exposed to the outside.

As shown, when the rear cover 103 is coupled to the rear case 102, a side portion of the rear case 102 can be exposed. In some cases, the rear case 102 may be completely covered by the rear cover 103 during the engagement. Meanwhile, the rear cover 103 may be provided with an opening for exposing the camera 121b and the sound output unit 152b to the outside.

These cases 101, 102, and 103 may be formed by injection molding of synthetic resin or may be formed of metal such as stainless steel (STS), aluminum (Al), titanium (Ti), or the like.

The mobile terminal 100 may be configured such that one case provides the internal space, unlike the above example in which a plurality of cases provide an internal space for accommodating various electronic components. In this case, a unibody mobile terminal 100 in which synthetic resin or metal is connected from the side to the rear side can be realized.

Meanwhile, the mobile terminal 100 may include a waterproof unit (not shown) for preventing water from penetrating into the terminal body. For example, the waterproof portion is provided between the window 151a and the front case 101, between the front case 101 and the rear case 102, or between the rear case 102 and the rear cover 103, And a waterproof member for sealing the inside space of the oven.

The mobile terminal 100 is provided with a display unit 151, first and second sound output units 152a and 152b, a proximity sensor 141, an illuminance sensor 142, a light output unit 154, Cameras 121a and 121b, first and second operation units 123a and 123b, a microphone 122, an interface unit 160, and the like.

1B and 1C, a display unit 151, a first sound output unit 152a, a proximity sensor 141, an illuminance sensor 142, an optical output unit (not shown) A second operation unit 123b, a microphone 122 and an interface unit 160 are disposed on a side surface of the terminal body, And a mobile terminal 100 having a second sound output unit 152b and a second camera 121b disposed on a rear surface thereof.

However, these configurations are not limited to this arrangement. These configurations may be excluded or replaced as needed, or placed on different planes. For example, the first operation unit 123a may not be provided on the front surface of the terminal body, and the second sound output unit 152b may be provided on the side surface of the terminal body rather than the rear surface of the terminal body.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven by the mobile terminal 100 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information .

The display unit 151 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), a flexible display display, a 3D display, and an e-ink display.

In addition, the display unit 151 may exist in two or more depending on the embodiment of the mobile terminal 100. In this case, the mobile terminal 100 may be provided with a plurality of display portions spaced apart from each other or disposed integrally with one another, or may be disposed on different surfaces, respectively.

The display unit 151 may include a touch sensor that senses a touch with respect to the display unit 151 so that a control command can be received by a touch method. When a touch is made to the display unit 151, the touch sensor senses the touch, and the control unit 180 generates a control command corresponding to the touch based on the touch. The content input by the touch method may be a letter or a number, an instruction in various modes, a menu item which can be designated, and the like.

The touch sensor may be a film having a touch pattern and disposed between the window 151a and a display (not shown) on the rear surface of the window 151a, or may be a metal wire . Alternatively, the touch sensor may be formed integrally with the display. For example, the touch sensor may be disposed on a substrate of the display or inside the display.

In this way, the display unit 151 can form a touch screen together with the touch sensor. In this case, the touch screen can function as a user input unit 123 (see FIG. 1A). In some cases, the touch screen may replace at least some functions of the first operation unit 123a.

The first sound output unit 152a may be implemented as a receiver for transmitting a call sound to a user's ear and the second sound output unit 152b may be implemented as a loud speaker for outputting various alarm sounds or multimedia playback sounds. ). ≪ / RTI >

The window 151a of the display unit 151 may be provided with an acoustic hole for emitting the sound generated from the first acoustic output unit 152a. However, the present invention is not limited to this, and the sound may be configured to be emitted along an assembly gap (for example, a gap between the window 151a and the front case 101) between the structures. In this case, the appearance of the mobile terminal 100 can be made more simple because the hole formed independently for the apparent acoustic output is hidden or hidden.

The optical output unit 154 is configured to output light for notifying the occurrence of an event. Examples of the event include a message reception, a call signal reception, a missed call, an alarm, a schedule notification, an email reception, and reception of information through an application. The control unit 180 may control the light output unit 154 to terminate the light output when the event confirmation of the user is detected.

The first camera 121a processes an image frame of a still image or a moving image obtained by the image sensor in the photographing mode or the video communication mode. The processed image frame can be displayed on the display unit 151 and can be stored in the memory 170. [

The first and second operation units 123a and 123b may be collectively referred to as a manipulating portion as an example of a user input unit 123 operated to receive a command for controlling the operation of the mobile terminal 100 have. The first and second operation units 123a and 123b can be employed in any manner as long as the user is in a tactile manner such as touch, push, scroll, or the like. In addition, the first and second operation units 123a and 123b may be employed in a manner that the user operates the apparatus without touching the user through a proximity touch, a hovering touch, or the like.

In this figure, the first operation unit 123a is a touch key, but the present invention is not limited thereto. For example, the first operation unit 123a may be a mechanical key, or a combination of a touch key and a touch key.

The contents input by the first and second operation units 123a and 123b can be variously set. For example, the first operation unit 123a receives a command such as a menu, a home key, a cancellation, a search, and the like, and the second operation unit 123b receives a command from the first or second sound output unit 152a or 152b The size of the sound, and the change of the display unit 151 to the touch recognition mode.

On the other hand, a rear input unit (not shown) may be provided on the rear surface of the terminal body as another example of the user input unit 123. The rear input unit is operated to receive a command for controlling the operation of the mobile terminal 100, and input contents may be variously set. For example, commands such as power on / off, start, end, scrolling, and the like, the size adjustment of the sound output from the first and second sound output units 152a and 152b, And the like can be inputted. The rear input unit may be implemented as a touch input, a push input, or a combination thereof.

The rear input unit may be disposed so as to overlap with the front display unit 151 in the thickness direction of the terminal body. For example, the rear input unit may be disposed at the rear upper end of the terminal body such that when the user holds the terminal body with one hand, the rear input unit can be easily operated using the index finger. However, the present invention is not limited thereto, and the position of the rear input unit may be changed.

When a rear input unit is provided on the rear surface of the terminal body, a new type of user interface using the rear input unit can be realized. When the first operation unit 123a is not disposed on the front surface of the terminal body in place of at least a part of the functions of the first operation unit 123a provided on the front surface of the terminal body, The display unit 151 can be configured as a larger screen.

Meanwhile, the mobile terminal 100 may be provided with a fingerprint recognition sensor for recognizing the fingerprint of the user, and the controller 180 may use the fingerprint information sensed through the fingerprint recognition sensor as authentication means. The fingerprint recognition sensor may be embedded in the display unit 151 or the user input unit 123.

The microphone 122 is configured to receive the user's voice, other sounds, and the like. The microphone 122 may be provided at a plurality of locations to receive stereophonic sound.

The interface unit 160 is a path through which the mobile terminal 100 can be connected to an external device. For example, the interface unit 160 may include a connection terminal for connection with another device (for example, an earphone or an external speaker), a port for short-range communication (for example, an infrared port (IrDA Port), a Bluetooth port A wireless LAN port, or the like), or a power supply terminal for supplying power to the mobile terminal 100. The interface unit 160 may be implemented as a socket for receiving an external card such as a SIM (Subscriber Identification Module) or a UIM (User Identity Module) or a memory card for storing information.

And a second camera 121b may be disposed on a rear surface of the terminal body. In this case, the second camera 121b has a photographing direction which is substantially opposite to that of the first camera 121a.

The second camera 121b may include a plurality of lenses arranged along at least one line. The plurality of lenses may be arranged in a matrix form. Such a camera can be named an 'array camera'. When the second camera 121b is configured as an array camera, images can be taken in various ways using a plurality of lenses, and a better quality image can be obtained.

The flash 124 may be disposed adjacent to the second camera 121b. The flash 124 shines light toward the subject when the subject is photographed by the second camera 121b.

And a second sound output unit 152b may be additionally disposed in the terminal body. The second sound output unit 152b may implement a stereo function together with the first sound output unit 152a and may be used for implementing a speakerphone mode in a call.

The terminal body may be provided with at least one antenna for wireless communication. The antenna may be embedded in the terminal body or formed in the case. For example, an antenna constituting a part of the broadcast receiving module 111 (see FIG. 1A) may be configured to be able to be drawn out from the terminal body. Alternatively, the antenna may be formed in a film type and attached to the inner surface of the rear cover 103, or a case including a conductive material may be configured to function as an antenna.

The terminal body is provided with a power supply unit 190 (see FIG. 1A) for supplying power to the mobile terminal 100. The power supply unit 190 may include a battery 191 built in the terminal body or detachable from the outside of the terminal body.

The battery 191 may be configured to receive power through a power cable connected to the interface unit 160. In addition, the battery 191 may be configured to be wirelessly chargeable through a wireless charger. The wireless charging may be implemented by a magnetic induction method or a resonance method (magnetic resonance method).

The rear cover 103 is configured to be coupled to the rear case 102 so as to cover the battery 191 to restrict the release of the battery 191 and to protect the battery 191 from external impact and foreign matter . When the battery 191 is detachably attached to the terminal body, the rear cover 103 may be detachably coupled to the rear case 102.

The mobile terminal 100 may be provided with an accessory that protects the appearance or supports or expands the function of the mobile terminal 100. [ One example of such an accessory is a cover or pouch that covers or accommodates at least one side of the mobile terminal 100. [ The cover or pouch may be configured to interlock with the display unit 151 to expand the function of the mobile terminal 100. Another example of an accessory is a touch pen for supplementing or extending a touch input to the touch screen.

Also, the mobile terminal 100 according to the present invention may use different radio interfaces and / or physical layers in a communication system. 2A shows an example of a wireless communication system of a mobile terminal according to the present invention.

Wireless interfaces that can be used by the communication system include, but are not limited to, frequency division multiple access (FDMA), time division multiple access (TDMA), code division multiple access (CDMA) (UMTS) (especially Long Term Evolution (LTE)), Global System for Mobile Communications (GSM), and the like.

Hereinafter, for the sake of convenience of description, the description will be limited to CDMA. However, it is apparent that the present invention can be applied to all communication systems including CDMA wireless communication systems.

The CDMA wireless communication system includes at least one terminal 100, at least one base station (BS), at least one base station controller (BSCs), and a mobile switching center (MSC) can do. The MSC is configured to be coupled to a Public Switched Telephone Network (PSTN) and BSCs. The BSCs may be paired with the BS via a backhaul line. The backhaul line may be provided according to at least one of E1 / T1, ATM, IP, PPP, Frame Relay, HDSL, ADSL or xDSL. Thus, a plurality of BSCs 275 may be included in the system shown in FIG. 2A.

Each of the plurality of BSs may comprise at least one sector, and each sector may comprise an omnidirectional antenna or an antenna pointing to a particular direction of radial from the BS. In addition, each sector may include two or more antennas of various types. Each BS may be configured to support a plurality of frequency assignments, and a plurality of frequency assignments may each have a specific spectrum (e.g., 1.25 MHz, 5 MHz, etc.).

The intersection of sector and frequency assignment may be referred to as a CDMA channel. The BS may be referred to as a base station transceiver subsystem (BTSs). In this case, a combination of one BSC and at least one BS may be referred to as a " base station ". The base station may also indicate a " cell site ". Alternatively, each of the plurality of sectors for a particular BS may be referred to as a plurality of cell sites.

During typical operation of a wireless communication system, the BS receives a reverse link signal from the mobile terminal 100. [ At this time, the mobile terminal 100 is connecting a call, transmitting or receiving a message, or performing another communication operation. Each of the reverse link signals received by a particular base station is processed by a particular base station. The resultant data is transmitted to a connected BSC. The BSC provides call resource allocation and mobility management functions, including the organization of soft handoffs between base stations. The BSCs also transmit the received data to the MSC, which provides additional transport services for connection with the PSTN. Similarly, the PSTN may be coupled to the MSC, the MSC may be coupled to the BSCs, and the BSCs may control the BS such that the forward link signal is transmitted to the mobile terminal 100.

Next, a method of acquiring location information of a mobile terminal using a WiFi (Wireless Fidelity) Positioning System (WPS) will be described.

The WiFi Positioning System (WPS) is a system in which a mobile terminal 100 uses a WiFi module included in the mobile terminal 100 and a wireless AP (wireless access point) transmitting or receiving a wireless signal with the WiFi module, Is a technology for tracking a location of a wireless local area network (WLAN) using WiFi.

The WiFi location tracking system may include a Wi-Fi location server, a mobile terminal 100, a wireless AP connected to the mobile terminal, and a database in which certain wireless AP information is stored.

The Wi-Fi position location server extracts information of the wireless AP connected to the mobile terminal 100 based on the location information request message (or signal) of the mobile terminal 100. The information of the wireless AP connected to the mobile terminal 100 may be transmitted to the Wi-Fi location server through the mobile terminal 100 or may be transmitted from the wireless AP to the Wi-Fi location server.

SSID, RSSI, channel information, Privacy, Network Type, Signal Strength, and Noise Strength based on the location information request message of the mobile terminal 100, Lt; / RTI >

As described above, the Wi-Fi position location server receives the information of the wireless AP connected to the mobile terminal 100, compares the information included in the built-in database with the received wireless AP information, Extract (or analyze) location information.

Next, a database storing arbitrary wireless AP information may be stored in the database in a variety of information of arbitrary wireless APs located at different locations.

The information of any wireless APs stored in the database includes at least one of MAC address, SSID, RSSI, channel information, privacy, network type, radar coordinate of the wireless AP, building name, Available), the address of the AP owner, telephone number, and the like.

As described above, since the database stores arbitrary wireless AP information and location information corresponding to the wireless AP, the Wi-Fi location server can respond to information of a wireless AP connected to the mobile terminal 100 in the database The location information of the mobile terminal 100 can be extracted by searching the wireless AP information and extracting the location information matched with the retrieved wireless AP information.

The location information of the extracted mobile terminal 100 is transmitted to the mobile terminal 100 through the Wi-Fi location server, so that the mobile terminal 100 can acquire the location information.

Next, FIG. 2B shows a roaming process of the mobile terminal according to the present invention.

Referring to FIG. 2B, the roaming process of the mobile station UE 100 will be described with reference to FIG. 2B. Referring to FIG. 2B, when the mobile station 100 receives a service area of a base station (e.g., a home base station) 270a of a Public Land Mobile Network (PLMN) It is possible to roam to the visited base station 270b through location registration when moving to the service area 203 of the base station (e.g., the visited base station 270b) of the Public Land Mobile Network (PLMN) have. Here, PLMN 1 may be a home network or a preferred network, and PLMN 2 may be a visited network or a non-preferred network. The PLMN 1 and the PLMN 2 may have a roaming area 202 superimposed on each other and may be roamed to the visited base station 270 b in the overlapped roaming area 202.

The mobile terminal 100 searches for the home PLMN every predetermined period stored in the SIM of the terminal after completion of the roaming. When the mobile terminal 100 moves into the service area 201 of the home base station 270a, it can camp on the home station 270a of the PLMN 1 again. For this, the mobile terminal 100 may include a plurality of different network search periods, for example, different search methods may be applied to the network search method at the expiration of the first search period and at the expiration of the second search period. For example, when the first search period expires, only the frequencies included in the stored frequency list are scanned to search for the network, and when the second search period expires, all the frequencies around the terminal are scanned for full scan.

On the other hand, when the mobile terminal 100 moves to a non-service area, re-enters a service area of the home network after roaming to the PLMN 2, or can not find a PLMN providing a roaming service, We propose a network discovery method for service. That is, according to the present invention, when all of the PLMNs stored in the PLMN, the home PLMN, and the SIM registered in the mobile terminal 100 fail to be searched, information (e.g., MCC, MNC information) It is possible to identify the roaming area / country corresponding to the current location. And, one can connect to one of the successfully camped PLMNs in the identified roaming area / country to perform uninterrupted roaming. Accordingly, when the time required for searching and camping the PLMN for the roaming service is reduced, battery consumption for searching for the network is further reduced.

3 is a flowchart for explaining an operation of searching for a network to be connected for a roaming service according to an embodiment of the present invention.

3, when the mobile terminal 100 is powered on, the flight mode is on / off, and the mobile terminal 100 enters a service area in a non-service area, the controller 180 of the mobile terminal 100 Searches the PLMN stored in the last registered Public Land Mobile Network (PLMN), home PLMN, and SIM card for service. As a result of the search, if any one of the PLMNs is searched, the mobile communication service can be provided by camping on by attempting location registration with the corresponding base station.

On the other hand, it can be sensed that all of the PLMNs stored in the last registered Public Land Mobile Network (PLMN), the Home Public Land Mobile Network (PLMN), and the SIM (SIM) For example, when the mobile terminal 100 enters the non-service area or enters the heterogeneous network according to the movement of the mobile terminal 100, the mobile communication service is disconnected. Therefore, a network search must be performed to perform roaming again. At this time, if all of the search for the PLMNs stored in the last registered PLMN, the home PLMN, and the SIM (SIM) fails, the PLMN can be quickly searched through the following processor.

Specifically, the controller 180 of the mobile terminal 100 determines whether the current position of the mobile station 100 based on information included in PLMNs found in the main body, for example, MMC (Mobile Country Code) and / or MNC / RTI > (S20). ≪ / RTI > That is, the roaming area / country corresponding to the current location is first identified in a random manner or without repeatedly camping on based on signal strength for all scanned PLMNs. Specifically, the mobile country code / mobile network code information of PLMNs (any PLMNs) detected in the area can be used to easily identify the roaming area / country. For example, the MMC of the detected PLMN is compared with the MMC of the last registered PLMN. If they do not coincide with each other, it is recognized as international roaming, and information is received from the base station of the neighboring cell and the roaming country / .

Next, the control unit 180 may control the wireless communication unit 110 to perform roaming by connecting to one of the successfully camped PLMNs in the identified roaming area / country (S30). Specifically, the controller 180 determines whether there is a PLMN that has been successfully camped in the identified roaming area / country, and first tries camping on the identified PLMN.

Accordingly, the time required for searching and camping the PLMN for the roaming service is reduced. In addition, as the search and camping of suitable PLMNs that provide roaming services is faster, battery consumption for network discovery is further reduced.

Next, FIG. 4 shows an operation related to a wireless communication technology to be used in a network connection in a roaming country / region in a mobile terminal according to the present invention.

First, if the control unit 180 of the mobile terminal 100 detects that all PLMNs stored in the last registered PLMN, the home PLMN, and the SIM card have failed to be included in the retrieved PLMNs (MMC) and / or mobile network code (MNC) to identify the roaming area / country corresponding to the current location.

Next, the control unit 180 determines whether there is a PLMN that has been camped previously in the identified roaming area / country, and when the camping ON attempt is made to the PLMN, the PLMN has been previously successful in the identified roaming area / (RAT) that was used when camped in (step S410).

Next, the control unit 180 may attempt camping on the previously registered PLMN in the identified roaming area / country using the identified optimal wireless communication technology (RAT) (S420). If the PLMN is successful, the mobile communication service is provided through the base station of the corresponding PLMN.

Meanwhile, in one embodiment, after the camping on attempt is successful, if the previous registered PLMN is not the home PLMN even after the roaming of the mobile terminal 100 is completed, the home PLMN can be searched for every predetermined period have. Accordingly, when the mobile terminal 100 moves back to the service area of the home PLMN, it can immediately camp on the searched home PLMN so that roaming charges do not occur. For this, the controller 180 may include a plurality of different home PLMN search cycles. For example, when the first search period expires, only the frequencies included in the pre-stored frequency list are searched to search for the home PLMN, and when the second search period expires, the neighboring frequencies are fully scanned to search for the home PLMN It will be possible.

Also, in one embodiment, cell overlay information is obtained based on information dispatched from the base station of the neighboring home PLMN, so that the mobile terminal 100 can quickly and register with the home PLMN. Accordingly, even when there is another PLMN having the same signal intensity as that of the home PLMN but using the same frequency as the home PLMN according to the acquired cell overlap information, the mobile terminal 100 does not change the frequency Lt; RTI ID = 0.0 > PLMN < / RTI >

5 is an exemplary flowchart for explaining an operation of searching for a network to be connected when the last registered network in the roaming country / region is not available in the mobile terminal according to the present invention.

First, the roaming area / country is identified using the mobile country code (MMC) and / or the mobile network code (MNC) included in the discovered PLMNs, and the camping fails in the last camped PLMN in the identified roaming area / (S510).

Then, the control unit 180 of the mobile terminal 100 determines a PLMN to camp based on the pre-stored fixed list. Specifically, the controller 180 checks the home PLMN approved by the corresponding roaming area / country based on the previously stored fixed list, and then camps on the corresponding home PLMN (S520).

Here, the fixed list may be a table including home PLMNs approved in all roaming countries / regions. For example, since the MCC code of the home PLMN and the PLMN of the roaming are different depending on which country's business base station is used as the home PLMN by the user of the mobile terminal, a plurality of PLMN information that can be roamed by the MCC / It can be organized in table form. In this case, the control unit 23 of the mobile terminal 100 may attempt to camp on after reading the home PLMN approved by the roaming area / country identified in the roaming PLMN table stored in the SIM (SIM).

FIG. 6 is a flowchart for explaining an entire process of searching for a camping-on network to be connected in roaming in a mobile terminal according to the present invention.

Referring to FIG. 6, the step of detecting that the mobile terminal 100 has failed to search all the PLMNs stored in the last registered PLMN, the home PLMN, and the SIM (step S610). In this case, since the mobile communication service is interrupted, a suitable PLMN must be quickly searched. In operation S620, the mobile terminal 100 identifies a roaming area / country corresponding to the current location of the terminal using information included in the found PLMN, for example, a mobile country code / mobile network code. Accordingly, it is determined whether the previously registered PLMN in the identified roaming area / country is available (S630). At this time, it is also possible to confirm whether or not the usable PLMN is the home PLMN.

If it is determined in step S630 that a PLMN available in the corresponding roaming area / country has been found, camping is attempted on the previously registered PLMN using the optimal RAT in step S635. If the camping attempt succeeds, the mobile communication service is provided by camping in the corresponding PLMN and is terminated. In one embodiment, upon successful camping in the last registered PLMN in the identified roaming area / country, the corresponding PLMN may be automatically registered with the preferred PLMN in the identified roaming area / country. At this time, if the camping succeeded PLMN is a home PLMN, it registers as a preferred network, otherwise it can not automatically register as a preferred network.

On the other hand, if it is determined in step S630 that the available PLMN in the corresponding roaming area / country is not searched or if the camping attempt in step S635 fails, the list of PLMNs approved as the home PLMN in the corresponding roaming area / (S640).

If it is determined in step S640 that the PLMN list approved by the home PLMN is available, camping is attempted in the home PLMN of the list (S645). Specifically, camping on is attempted according to a cycle stored in SIM (Sim) using the list of approved PLMNs. If the camping attempt succeeds, the mobile communication service is provided by camping in the corresponding PLMN and is terminated. On the other hand, if it is determined in step S640 that the list of PLMNs approved for the home PLMN can not be used, or if the camping attempt in step S645 fails, camping can be attempted in the PLMN having a strong signal strength among the found PLMNs ). At this time, if the found PLMN is not the home PLMN, the home PLMN can be searched at a predetermined period.

FIGS. 7A and 7B are diagrams for comparing operations of the mobile terminal 100 to which the network search method according to the present invention is applied and the user terminals according to the existing network search method. FIG. 7A shows a screen change according to a network search in a mobile terminal (UE 1) to which a network search method according to the present invention is applied, FIG. 7B shows a screen change in a mobile terminal (UE 2) .

For example, as shown in FIG. 7A, in a mobile terminal UE 1 to which a network search method described in the present invention is applied, a PLMN (public land mobile network), a home PLMN, The first roaming icon 701 indicating that the mobile communication service is disconnected is displayed on the upper bar of the display unit 151. [ At this time, when about 2 to 5 seconds have elapsed according to the network search method described in the present invention, camping on the PLMN available in the roaming area / country and receiving the mobile communication service again. Accordingly, the first roaming icon 701 displayed on the upper bar of the display unit 151, as shown in the right side of FIG. 7A, The roaming icon 702 is changed. Referring to FIG. 7B, in the mobile station UE2 using the existing network search method, all the PLMNs stored in the last registered Public Land Mobile Network (PLMN), home PLMN, and SIM card are failed The first roaming icon 703 indicating that the mobile communication service is disconnected to the upper bar of the display unit 151 is maintained even after a few seconds have elapsed. This is because the PLMNs that are available in the roaming region / country continue to attempt to camp on randomly. As a result of the test, after about 15 to 20 seconds have elapsed, the mobile communication service can be provided by searching for available PLMNs.

8 is a diagram illustrating a simulation setting for detecting a case where a network search method is applied to a mobile terminal related to the present invention.

Referring to FIG. 8, a simulation setting is established between an RF combiner 805 and a user equipment (UE), that is, a mobile terminal 100, and a network simulator of different types, that is, a first simulator (Agilent 1) The second simulator (Agilent 2) 812 is connected to the RF combiner 805, respectively. At this time, the first simulator (Agilent 1) 811 and the second simulator (Agilent 2) 812 are not directly connected. It is assumed that the mobile terminal 100 is moved to the roaming area.

In FIG. 8, the mobile terminal 100 may be initially latched to PLMN 001-01, which is the home PLMN of the first simulator 811. This can be performed by changing the MCC and the MNC of the network simulator. Then, if the first simulator 811 is disconnected, the signal is cut off in the mobile terminal 100. Now, when the second simulator 812 using the PLMN 001-02 is switched on, the mobile terminal 100 is also camped on here. After a predetermined time, if the first simulator 811 using PLMN 001-01 is switched on again, the mobile terminal 100 is camped on PLMN 001-01 again using the home PLMN search.

Thereafter, both the first simulator 811 and the second simulator 812 are turned off and then power-on. At this time, PLMN 001-03 different from the previous one is applied to the first simulator 811. Then, a relatively strong signal is output in the first simulator 812 using the PLMN 001-03. At this time, if the mobile terminal 100 is tested to be camped on the second simulator 812 using the PLMN 001-02 rather than the first simulator 812 that emits a strong signal, then the network search method Can be said to be applied.

As described above, according to the present invention, time required for searching and camping a PLMN for a roaming service is reduced. In addition, as the appropriate PLMN providing roaming service is quickly searched and camped, battery consumption for network search can be further reduced.

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer readable medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, , And may also be implemented in the form of a carrier wave (e.g., transmission over the Internet). Also, the computer may include a control unit 180 of the terminal. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

Claims (14)

Detecting that all of the PLMNs (Public Land Mobile Network), the Home Public Land Mobile Network (PLMN), and the SIM (SIM) stored in the terminal body have failed to search;
Identifying a roaming area / country corresponding to a current location of the terminal based on information included in PLMNs searched in the terminal body; And
And performing roaming by accessing one of the successfully camped PLMNs in the identified roaming area / country. The method according to claim 1,
Wherein the information included in the PLMN searched in the terminal body is at least one of a mobile country code (MCC) and a mobile network code (MNC). The method according to claim 1,
Further comprising checking whether there is a previously camped PLMN in the identified roaming area / country, and attempting to camp on the PLMN. The method of claim 3,
Determining a wireless communication technology to camp on the basis of an optimal wireless communication technology (RAT) used when camping on successfully, when successfully camped in the PLMN in the identified roaming area / country, A network access method for a roaming service of a mobile terminal. The method of claim 3,
Further comprising the step of determining a PLMN to camp on the basis of the fixed list stored in the terminal body when the last registered PLMN in the identified roaming area / country is unavailable, Connection method. 6. The method of claim 5,
And if the PLMN determined based on the stored fixed list can not be used, attempting to camp on sequentially from a PLMN having a strong signal strength among the PLMNs searched for in the terminal main body A network access method for. The method of claim 3,
Further comprising the step of automatically registering the PLMN as a preferred PLMN in the identified roaming area / country upon camping in the last registered PLMN in the identified roaming area / country. / RTI > The method of claim 3,
Confirming a list of PLMNs approved as home PLMNs in the identified roaming area / country if the last registered PLMN in the identified roaming area / country is unavailable; And
And attempting camping-on according to a cycle stored in the SIM using the list of confirmed PLMNs. A terminal body;
A wireless communication unit; And
In response to the detection that all PLMNs stored in the last registered PLMN, the home PLMN, and the SIM (SIM) have failed to be detected, based on the information included in the PLMNs retrieved from the terminal body, And a controller for identifying the corresponding roaming area / country and controlling the wireless communication unit to connect to one of the successfully camped PLMNs in the identified roaming area / country. 10. The method of claim 9,
Wherein the information included in the PLMNs detected by the terminal body is at least one of a mobile country code (MCC) and a mobile network code (MNC). 10. The method of claim 9,
Wherein,
Wherein the control unit controls the radio communication unit to check whether there is a PLMN that has been camped in the identified roaming area / country and to camp on the PLMN. 12. The method of claim 11,
Wherein,
And determines a wireless communication technology to camp on the basis of the optimal wireless communication technology (RAT) used when the camping on attempt was successfully camped in the PLMN previously in the identified roaming area / country. 12. The method of claim 11,
Wherein,
If the last registered PLMN in the identified roaming area / country is not available, determines a PLMN to camp on the basis of the fixed list stored in the terminal body. 14. The method of claim 13,
Wherein,
Wherein when the PLMN determined based on the stored fixed list is not available, the mobile terminal sequentially attempts to camp on from a PLMN having a strong signal strength among the PLMNs searched for in the terminal body.

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